<!doctype html>
<html lang="en">
  <head>
    <!--  meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="css/bootstrap.css">	
    <style>
		div{
			border: 1px solid;
		}
	</style>
  </head>
  <body>
    <div class="container">
    	<div class="row">
    		<div class="col-md-2">col-md-2</div>
			<div class="col-md-4">col-md-4</div>
			<div class="col-md-6">col-md-6</div>
    	</div>
		<div class="row">
			<div class="col-lg-2">col-lg-2</div>
			<div class="col-lg-4">col-lg-4</div>
			<div class="col-lg-6">col-lg-6</div>
		</div>
    </div>

  </body>
</html>